I'm trying to find out if it's possible to create custom point markers (from some image files) in Matlab with Mapping Toolbox.

So far, I haven't found anything about this in their documentation. Online searches only yielded:

No. The marker shapes are hard-coded and you cannot add new ones. If you want a custom
marker, then at each point you want the marker, you will have to use line() or
equivalent to draw the marker or image() or equivalent to draw in an image.